Thanks to fellow bike restorer Patrick Calmels from Tassie, i have managed to free the stubborn fixed cup. As he suggested in the comments of the previous post, using a large bolt through the cup ( along with plenty of Reducteur H-72 Releasing Agent …. it’s available from Bunnings, though not cheap ! ) … and the cup is free !
The main difficulties to removing fixed cups are either not getting good leverage with a tool, and / or not getting a safe grip – and in the case of this cup, no spanner flats – only two pinholes. These offer very little hold for any pin spanner, with the likelihood of barked knuckles following a slip. This homemade tool is an approx. 18mm bolt with a number of washer spacers, to be used with a ring or socket spanner.
As Patrick suggested, tightening the bolt clockwise actually loosens the left handed thread naturally. I was worried at first that the bearing surface might be damaged, but it was fine.
This tool wouldn’t work on the left side adjustable cup unless one used a left hand threaded bolt, but I find it’s usually the right side fixed cup that gives most trouble.
On a bike that could be up to 7 or 8 decades old, the bearing surfaces are all shiny and un-pitted, even more remarkable in an unsealed bracket which is open to both internal and external grit. An explanation might be that the oil port was used frequently to top it up, as there is a lot of dried lubricant all over the inside of the BB shell. The cups are Bramptons and the axle is a Bayliss-Wiley No. 14.
There are no markings to identify the crank set, though it uses the same 5-pin arrangement to remove the chain ring that is used on the Williams and Utility brands I’ve seen on similar old bikes.
I used citrus paint stripper, steel pot scourers and an old knife to remove the light blue enamel, which has revealed a very tiny amount of the original finish – dark blue, with orange and white ( or cream ) highlights.
There was rough surface rust under the paint, so it needs more work yet, but have a look at that serial number on the seat lug No. “165” – cool bananas !
So far, so good !